Extrusion press



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July 19, 1932. F. H. BARNLEY I 1,868,189

EXTRUSION PRESS Filed April 23, 1931 I \llllil Mu i? Inue ni'or:

Patented July 19, 1932 UNITED STATES IMPERIAL CHEMICAL INDUSTRIES LIMITED, A. coRroR TIoN OF-GBEAT BBITAIN FRANK HERBERT BARNSLEY, or sMETHWIQ BIRMINGnAM, ENGLAND, nssreNoR 'ro Ex'rRusro rREss Application filed April as, 1931, Serial No. 532,305, andin Great Britain May 1,1930. i

This invention relates to extrusion presses with particular reference to those employed for the manufacture of seamless tubes of nonferrous metals. 7

S In all methods of extrusion hitherto adopted a residue or discard is left in the container, and many attempts have been made to satisfactorily remove and dispose of this waste material. Thusin some cases the extruded 10 article with the discard attached is ejected from the container and the two thereafter severed while in other cases a round cutting tool operated either by hand hammer or by the pressure of the press has been employed for the actual cutting-off operation but in such cases the tool has to be inserted in the container before and withdrawn from the con.- tainerafter the cutting operation; by hand, so that this arrangement reduces the number of operations of the press that are possible in a given time and imposes considerable manual labour upon the operator.

The object of the present invention is to provide improved means for removing the residue or discard which will facilitate the carrying out of the necessary operations and increase, the output of the press.

The invention consists in an extrusion press having a tool suspended from or carried'by' the moving head of the press and operated by said head or by the extrusion plunger for the purpose of cutting and'removing the residue or discard from the extruded article.

Further features of the invention will be apparent from the description given here- 8 a ter. 8 i

The'accompanying drawing illustrates one mode of carrying out the invention.

Figure 1 is an elevation showing a part of an extrusion press constructed and operated in accordance with the invention.

Figure 2 is a similar View butshowing the I parts in a different position, and

ting tool in its operative and inoperative positions.

In carrying my invention into effect in one [convenient manner as, for example, in its application to an extrusion press for the formation of seamless tubes, I form my press position the cutting tool is'then swung into the position shown by the full lines in Fig- Figure 3 is a plan view showing the cut in any usual orsuitable mannerwith a reeating head I secure a lifting rod or other fitting 0 serving asa pivot about which may be rotated an arm jcZ carrying a circular cutting tool e which is to perform the operation of. cutting and removing the discard from the container. The arrangement issuch that when the extrusion plunger is required to perform its extrusion stroke the cutting tool is rotated'into the position shown dotted in Figures 1 and, 3 so that thereby it will be clearof the container and the extrusion operation performed in the usual manner. After the return of the plunger to its upper ures 1 and 3 whereupon theextrusion plung' er (fits into and seats itself in a recess in the.

is lowered for the cuttingstroke as shown in top of the cutting tool as shown in dotted Figure 2. Upon the withdrawal. of the extrusion plunger and cutting tool the latter is I swung outside the container with the discard attached and when this discard has been reoperation.

The cutting tool arm may be moved by hand and while the invention has been described with particular reference to an exjtrusion press for the'formation of seamless tubes it will be clear that it may be applied with equal effect and like advantage in other zontal. I claim: v

1. In an extrusion press providedwith an extrusion plunger carried on a reciprocating head and a blank container containing a die and associated with a base plate, lifting" means attached to said head, a rotary arm carried by and pivoted onsaid lifting means,

arm and thus adapted :to be swung; into or};

anda cutting tool mounted on saidrotary moved the press is again ready for another 811 i away from operatingpositionbeneath said extruding plunger and to be operated byit. 2. In an extrusionpress provided with an extruding plunger carried on a reciprocating head and a blank container containing a die and associated with a base p1ate', a lifting rod carried by said head a rotary arm'carried by and pivoted on said lifting rod, a

cutting toolmounted on "said rotary arm and thus adapted to be "swung out of position when not in operation, a recess in the top of said cutting tool forming a seat for the reception of said extrudingplunger when said tool is swunginto operating'position be neath the plunger and means on the bottom of saidjcuttingtool to cut and remove the 1 waste portion of an extruded tube.

3. In an GXtI'USlOIIPIGSS comprising a reclprocatlng head provided with an extrusion plunger, a cutting tool carried by said head. 4

and adapted to be moved intoand out of position under said extrusion plunger and areoess in' the top of said tool formlng a seat for the reception of the plunger.

' In testimony whereof, I'aflix my signature.

v FRANK HERBERT BARNSLEY. 

